What the car in the video sounds like is a stock VW exhaust.
What you have in your photo is most of that, swapping out that big can across the back, and that can probably doesn't have much for noise-cancelling baffles inside.
Question: What size is your engine?
If it is a 1,600 up to a 1,776 you, too, could run a stock VW muffler like this:
https://www2.cip1.com/ProductD...3%2D251%2D053%2DAKKT
Dansk, in the Netherlands, made all of the mufflers for VW Beetles for like, forever, so if you've heard an old Beetle, that's what'cha get. Nice and quiet, just like your video.
Be warned that you absolutely NEED the two chromed tail pipes for a quiet engine as they drop the noise level by about half. You'll also look like the Pre-A 356's as they pretty much ran the same (Dansk) system. It should bolt right up.
Also be warned that you may, depending on your engine size, feel a slight drop in performance (which means you can sneak by people before they notice you because you're a lot quieter).
$124 bucks for that system is a really good deal, too. If you don't like it you can sell it to a local VW owner for about what you pay for it.